Opel mechanic with diesel experience

looking for a good mechanic with experience of opel diesels,
engine warning light coming on and cutting power - occurs around 60mph while cruising - cant get to the root of the problem!

have an engine code reader myself and have tested solenoids the egr valve, replaced the fuel pump, replaced the leak off pipes and done the injectors also checked the vacuum pump and pipes oh and i also cleaned out the intake air manifold. Car is giving way better fuel economy now but still gettin the engine warning light !
Error codes are P0400 critical system malfunction and P0190 Mechanical fault in fuel system. . . .

martinr5232

Mass air flow meter.

oh yeah lol i forgot to add that to the list of things ive already done - MAF swapped one from another vectra thats workin perfect

any other ideas throw them my way!

martinr5232

I had one before with a dodgy vacuam pump.

Was losing boost pressure.

What year and engine type is it.

but43r

Did you change the Fuel filter??? I had the same problem with my laguna and changing the fuel filter solved the problem.

thanks for the replies, i changed the entire fuel filter housing and filter! lol
and the fuel lines!!

its a y22dtr engine year 2000. 2.2dti.

martinr5232

martinr5232 wrote: »

I had one before with a dodgy vacuam pump.

Was losing boost pressure.

What year and engine type is it.

What kind of symptoms did you have?
Was it intermittent?

EXEO

Are the codes present or not present when you check with your code reader

EXEO

EXEO wrote: »

Are the codes present or not present when you check with your code reader

Not present, they only come up when the engine warning light comes on. I clear the codes and they only come back when the engine warning light comes on.

EXEO

Is the warning light staying on all the time or coming on now and then...is the engine the 2.0 dth version and what year is the car and what model

EXEO

its a y22dtr engine year 2000. 2.2dti.[/quote]

SORRY didnt see previous post...will check it out and get back to you...

EXEO

EXEO wrote: »

Is the warning light staying on all the time or coming on now and then

intermittent , seems to come on while sitting at a speed around 60mph - 70mph

martinr5232

On autodata those two faults come up as.

P0190= Fuel rail pressure sensor
P0400= EGR valve circuit.

Row

may be worth having a look..
http://www.cavweb-forums.co.uk/
http://www.vodc.co.uk/forum.php

Lucifer

I can help you out by providing you some diagnostic checks to do. Have you got a vacuum gauge? If so I can email you a procedure to check the problem. Usually critical system malfunction p0400 relates to a vacuum problem. Most likely being one of the small vacuum hoses. You will have to really check these properly because a tiny crack in one of these will cause this problem of an intermittent power loss and trouble code. Examine all of these and if possible take them off, cover one end and check them with a vacuum gauge. Also the connections at the ends of these can crack with age or become loose and will cause this. After you are 100% sure these are ok you can move on to the next step.

let me know if you have a vacuum gauge and pm me your email.

Lucifer

As for the second trouble code there are 3 trouble codes for P0190 but your code reader will probable not specify which it is.

P0190 - Mechanical Fault in Fuel System (Idle Speed)
P0190 - Mechanical Fault in Fuel System (Partial Load)
P0190 - Mechanical Fault in Fuel System (Full Load)

If the second trouble code is becoming present these are the things to check.

Mechanical fault in high-pressure section of injection pump
Check all mechanical components of the fuel system.
Point of breaks / scuff marks at the fuel or injection lines
Plugging, leakage or air in fuel system
Check injection nozzles

I know this isnt very specific but reply and let me know if you need more help on checking some of these things.

Its Partial load,

I had the Vacuum pipes checked at the diesel specialists as i couldnt find the problem myself, i also had the injectors and the seals done as i had starting problems. Starting problems are much improved but not perfect. was previously turning over for ages until it fired sometimes draining the battery! its not starting but slightly hesitant. Might change the fuel filter housing for a new one from opel instead of one from a scrap yard...!
Thanks for the info